Gamma Rays for Christmas

GRB_111209AThe gamma ray burst (GRB) from GRB 111209A (aka the Christmas Burst) was detected in early December, 2011. The blast produced high-energy emission for an astonishing seven hours, the longest-duration GRB ever observed. This false-color image shows the event as captured by the X-ray Telescope aboard NASA’s Swift satellite. Because the distance to the burst was not measured initially, astronomers came up with a couple of radically different interpretations. In one scenario, a solitary neutron star in our own galaxy shredded and accreted an approaching comet-like body. In the other, a neutron star spiraled into and was eaten by a giant star in a distant galaxy. Now, a third explanation has been advanced. After a measurement of the Christmas Burst’s host galaxy, it appears that the GRB resulted from the collapse and explosion of a supergiant star hundreds of times larger than the sun.

[youtube http://www.youtube.com/watch?v=MVQI8RC67Yw]

Image Credit: NASA

1 thought on “Gamma Rays for Christmas

Leave a Reply